Cheo-yong is a former investigations officer that sees ghosts. He is asked to look for the mother of a little boy. Sun-woo is trying to track down a taxi driving kidnapper. Na-young is a ghost, looking for a way to communicate.
Cheo-yong and Sun-woo investigate a mysterious secret at an all girl school that has lead to the death of one of it's students. Na-young wants to find out who she was in life.
Cheo-yong and Sun-woo try to solve the murder of a young man's body that was fished out of the lake. Na-young tries to prove her usefulness to Cheo-yong.
Cheo-yong tries to hunt down a mysterious killer whom he believes is an old enemy from his past. The rest of the team tries to figure out exactly what Cheo-yong is looking for.
